Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/25049
Campo DC | Valore | Lingua |
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dc.contributor.author | Martínez-Vázquez, C. E. | en_US |
dc.contributor.author | Monelli, Matteo | en_US |
dc.contributor.author | Gallart, C. | en_US |
dc.contributor.author | Bono, Giuseppe | en_US |
dc.contributor.author | Bernard, E. J. | en_US |
dc.contributor.author | Stetson, P. B. | en_US |
dc.contributor.author | FERRARO, Ivan | en_US |
dc.contributor.author | Walker, A. R. | en_US |
dc.contributor.author | DALL'ORA, Massimo | en_US |
dc.contributor.author | FIORENTINO, Giuliana | en_US |
dc.contributor.author | IANNICOLA, GIACINTO | en_US |
dc.date.accessioned | 2020-05-21T13:56:59Z | - |
dc.date.available | 2020-05-21T13:56:59Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25049 | - |
dc.description.abstract | We present the metallicity distribution of a sample of 471 RR Lyrae (RRL) stars in the Sculptor dSph, obtained from the I-band period-luminosity relation. It is the first time that the early chemical evolution of a dwarf galaxy is characterized in such a detailed and quantitative way, using photometric data alone. We find a broad metallicity distribution (full width at half-maximum equals to 0.8 dex) that is peaked at [Fe/H] ≃ -1.90 dex, in excellent agreement with literature values obtained from spectroscopic data. Moreover, we are able to directly trace the metallicity gradient out to a radius of ∼55 arcmin. We find that in the outer regions (r > ∼32 arcmin) the slope of the metallicity gradient from the RRLs (-0.025 dex arcmin<SUP>-1</SUP>) is comparable to the literature values based on red giant (RG) stars. However, in the central part of Sculptor, we do not observe the latter gradients. This suggests that there is a more metal-rich and/or younger population in Sculptor that does not produce RRLs. This scenario is strengthened by the observation of a metal-rich peak in the metallicity distribution of RG stars by other authors, which is not present in the metallicity distribution of the RRLs within the same central area. | en_US |
dc.language.iso | eng | en_US |
dc.title | Probing the early chemical evolution of the Sculptor dSph with purely old stellar tracers | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnrasl/slw093 | en_US |
dc.identifier.scopus | 2-s2.0-84982267440 | en_US |
dc.identifier.isi | 000383269900009 | en_US |
dc.identifier.url | https://academic.oup.com/mnrasl/article/461/1/L41/2589600 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 461 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | L41 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ESP | en_US |
dc.contributor.country | CAN | en_US |
dc.contributor.country | CHL | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016MNRAS.461L..41M | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.orcid | 0000-0001-8209-0449 | - |
crisitem.author.orcid | 0000-0003-0376-6928 | - |
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